Liquid Crystal Patents (Class 348/790)
  • Patent number: 8369890
    Abstract: A mobile electronic device provided with a static display that can be activated by a processor upon events in the mobile electronic device for alerting a user. A mobile electronic device provided with a flexible display that follows curved surfaces of the housing of the device and can be wrapped around corners and edges of the mobile electronic device.
    Type: Grant
    Filed: June 22, 2006
    Date of Patent: February 5, 2013
    Assignee: Nokia Corporation
    Inventor: Alberto Soto Nicolas
  • Patent number: 8344996
    Abstract: A method for updating a submatrix of a display matrix of a display device comprises sequentially selecting rows of the display matrix starting from an initial row of the display matrix. The method includes determining whether a selected row precedes a first row of the submatrix in a first drive frame of a waveform having two or more drive frames. If a condition that a selected row precedes the first row of the submatrix in the first drive frame of the waveform is false, the method includes addressing the selected row for a first line address period. If a condition that a selected row precedes the first row of the submatrix in the first drive frame of the waveform is true, the method includes addressing the selected row for a second line address period.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: January 1, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Jimmy Kwok Lap Lai, Eric Jeffrey
  • Patent number: 8345172
    Abstract: A display device uses a field sequential color scheme. Assume that a panel video writing period defines a period from the start of writing image data into a display panel to the completion of displaying the image on the basis of the image data in a sub-frame. A light source driving circuit generates a driving signal for gradually increasing the luminance of a light source of a color corresponding to a displayed image in the present sub-frame from zero to a predetermined value within the panel video writing period of the present sub-frame and for gradually decreasing the luminance of the light source from the predetermined value to zero within the panel video writing period of the next sub-frame. A light source driver drives the light source to emit light in accordance with the driving signal.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: January 1, 2013
    Assignee: NEC Display Solutions, Ltd.
    Inventor: Tooru Kataoka
  • Patent number: 8339522
    Abstract: There is provided a liquid crystal television and a plasma television that can adapt to various destinations and are resistant to noise in view of the difference of circuit configurations between a liquid crystal television and a plasma television. A video signal processing circuit is formed on a digital board, an input and output circuit is formed on a jack board, an audio signal processing circuit and a power supply circuit are formed on an analog board, and a rectifier circuit and an inverter circuit are formed on an inverter board. Further, on the back of the LCD, the inverter board is disposed in a vertically oriented shape in the left, the analog board is disposed in the lower center, the digital board is disposed in the upper center adjacent to the analog board, and the jack board is disposed in the upper right.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: December 25, 2012
    Assignee: Funai Electric Co., Ltd.
    Inventor: Takayoshi Urisu
  • Publication number: 20120314141
    Abstract: An object of the present invention is to provide a lighting device in which uneven brightness is less likely to occur. The lighting unit 12 according to the present invention includes LEDs 17, a light guide member 19, and a positioning member 23. The light guide member 19 has an end portion facing the LEDs 17 as light sources. The positioning member 23 is capable of positioning the light guide member 9 with respect to a planar direction thereof. The end portion of the light guide member 19 includes a cutout 24 through which the positioning member 23 is inserted. The cutout 24 has a shape that narrows as a distance from the LED 17 increases. With this configuration, light from the LED 17 hardly enter the cutout 24 compared with a cutout having a constant width.
    Type: Application
    Filed: February 3, 2011
    Publication date: December 13, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yasumori Kuromizu
  • Patent number: 8330877
    Abstract: A self-excited inverter comprises a pair of switching devices and a transformer having a primary side to which the switching devices are connected and a secondary side to which a lamp is connected. A pulse voltage is applied alternately to gates of the individual switching devices through a drive winding of the transformer, causing the switching devices to turn on and off in alternate turns to produce an AC voltage which is supplied from a pair of main windings of the transformer to the secondary side thereof. An input voltage supplied to the main windings of the transformer is divided by a voltage divider circuit configured with a plurality of resistors and voltages divided by the voltage divider circuit are applied to the gates of the individual switching devices so that the startup voltage follows the input voltage.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: December 11, 2012
    Assignee: Funai Electric Co., Ltd.
    Inventors: Hitoshi Miyamoto, Takashi Jinnouchi
  • Publication number: 20120300139
    Abstract: A planar lighting apparatus, liquid crystal display having the same and a television having the same are provided. The planar lighting apparatus includes a reflection sheet; a prism sheet which is spaced apart from the reflection sheet, and which includes a prism pattern on a surface of the prism sheet facing the reflection sheet; and a light source which emits light toward a space between the reflection sheet and the prism sheet and is disposed on at least one side of the space, wherein the prism pattern has a shape which reflects the light emitted from the light source.
    Type: Application
    Filed: May 25, 2012
    Publication date: November 29, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-eun LEE, Young-chol LEE, Nae-won JANG, Hyeong-sik CHOI
  • Publication number: 20120293730
    Abstract: Disclosed are a side light-type backlight device with high brightness and excellent light use efficiency, a liquid crystal display device and a television receiver. The backlight device according to the present invention is provided with a light guide plate, a prescribed side surface of which is a light incident surface, and a light source that is disposed so as to face the light incident surface of the light guide plate. The light source includes a plurality of side-emitting LEDs mounted on a substrate, and the plurality of LEDs are arranged on two levels in the vertical direction along the light incident surface.
    Type: Application
    Filed: January 18, 2011
    Publication date: November 22, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Munetoshi Ueyama
  • Publication number: 20120287354
    Abstract: The present invention relates to an electro-optical light modulation element and to electro-optical displays and display systems, such as television screens and computer monitors, containing elements of this type. The light modulation elements according to the invention contain a mesogenic modulation medium which is in the isotropic phase during operation of the light modulation elements and are particularly distinguished by very short response times in addition to good contrast and low viewing-angle dependence. The mesogenic modulation media used in the electro-optical light modulation elements are likewise a subject-matter of the present invention.
    Type: Application
    Filed: June 7, 2012
    Publication date: November 15, 2012
    Applicant: MERCK Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Michael HECKMEIER, Achim Götz
  • Publication number: 20120287353
    Abstract: This display includes point light sources, a light guide plate including a light-receiving surface on which light emitted from the point light sources is directly incident, opposed to the point light sources, and a display cell provided on a surface of the light guide plate, while a plurality of projecting portions each having a width smaller than a width of each of the point light sources in an extensional direction of a side of the light guide plate provided with the light-receiving surface are provided on a region of the light-receiving surface of the light guide plate opposed to the point light sources, and the plurality of projecting portions of the light guide plate are formed to have irregularly different shapes.
    Type: Application
    Filed: May 2, 2012
    Publication date: November 15, 2012
    Applicant: Funai Electric Co., Ltd.
    Inventor: Tomohisa TAJIRI
  • Publication number: 20120287355
    Abstract: It is an object of the present invention to provide a lighting device with improved light use efficiency.
    Type: Application
    Filed: January 11, 2011
    Publication date: November 15, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Tomoaki Oya
  • Publication number: 20120281153
    Abstract: A lighting device that achieves a small housing member and an appropriate positioning of an optical member is provided. The lighting device includes an LED board 40, a light guide plate 31 including an end surface 33 facing the LED board 40, an optical sheet 50 covering a light exit surface 31a of the guide plate 31, a positioning member P positioning the optical sheet 50 such that the optical sheet 50 is positioned with respect to the guide plate 31 in a planer direction, and a chassis 60. The positioning member P includes a positioning hole 55 formed in the optical sheet 50 and a positioning pin 35 provided on the guide plate 31 and configured to be fitted through the hole 55. The pin 35 is passed and fitted through the hole 55 and thus the optical sheet 50 is positioned with respect to the guide plate 31. The pin 35 is formed on the guide plate 31 and the chassis 60 as a housing member is not increased in size.
    Type: Application
    Filed: January 11, 2011
    Publication date: November 8, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yasumori Kuromizu
  • Publication number: 20120281155
    Abstract: A light source unit in which color reproduction range is widened and uneven brightness and color unevenness are less likely to occur is provided. The light source unit includes light source sets 21 each of which includes a first light source 22 and a second light source, and an LED board 27 on which the sets 21 are arranged. The first source 22 includes a first LED chip 23 configured to emit at least a color of light of red, green or blue and phosphors excited by the light to emit light, colors of which are different from the color of the light from the chip 23. The second source 26 is configured to emit at least a color of light of cyan, magenta or yellow. The first source 22A in one of the adjacent sets and the second source 26B in another one of the adjacent sets are arranged adjacent to each other in an arrangement direction in which the adjacent sets are arranged.
    Type: Application
    Filed: January 24, 2011
    Publication date: November 8, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yuya Takano
  • Publication number: 20120281154
    Abstract: In a lighting device, unevenness is less likely to be caused in exited light. A backlight unit 12 includes LEDs 17 as light sources, at least two LED boards 18 having the LEDs 17 thereon, a connecting portion 23 electrically connecting the at least two LED boards 18, and a reflection sheet 21 provided on a mounting surface 18a of the LED boards 18 on which the LEDS 17 are mounted and configured to reflect light. The connecting portion 23 is provided on a surface 18c of the LED board 18 adjacent to both of the mounting surface 18a and a surface 18b opposite to the mounting surface 18a.
    Type: Application
    Filed: January 13, 2011
    Publication date: November 8, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Ryuhichi Yokoyama
  • Publication number: 20120268664
    Abstract: This display includes a driving voltage output portion outputting a driving voltage when receiving a display-on signal. The driving voltage output portion includes a delay circuit portion provided between a first switching element and a second switching element for delaying output timing for the driving voltage with respect to input timing for the display-on signal by delaying switching of the second switching element.
    Type: Application
    Filed: April 9, 2012
    Publication date: October 25, 2012
    Applicant: Funai Electric Co., Ltd.
    Inventor: Hiroyuki MINATO
  • Patent number: 8294736
    Abstract: In one embodiment of the present invention, a method for driving a display device that outputs an image based on an image source is disclosed. The method includes the steps of (i) carrying out a first gradation converting process with respect to a first gradation level of an inputted video source signal; (ii) carrying out a smoothing process with respect to the inputted video source signal that has been subjected to the first gradation converting process; and (iii) carrying out a second gradation converting process with respect to a second gradation level of the inputted video source signal that has been subjected to the smoothing process.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: October 23, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Mitsuaki Hirata
  • Publication number: 20120262634
    Abstract: In a lighting device including a chassis housing a reflection sheet, the reflection sheet is reliably positioned with respect to the chassis and overcomes a flexure or wrinkle from the reflection sheet. In an edge light-type backlight unit 24, a reflection sheet 26 has a reflection sheet-side recess 26s on a first side 26a close to an LED unit 32 and a reflection sheet projected portion 26t on second sides 26b perpendicular to the first side 26a. A backlight chassis 22 has a chassis-side recess 22s and a chassis-side projected portion 22t projecting toward a surface opposite to a light exit surface of a light guide plate 20 and having a projected top surface facing the opposite surface. The reflection sheet-side recess 26t is fitted to the chassis-side projected portion 22s with a gap therebetween and the chassis-side recess 22t is fitted to the reflection sheet-side projected portion 26s with a gap therebetween.
    Type: Application
    Filed: December 13, 2010
    Publication date: October 18, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yuya Takano
  • Publication number: 20120262633
    Abstract: An object is to provide a lighting device with improved workability in assembling a light guide plate, a display device and a television receiver using this lighting device. The lighting device according to the present invention has LEDs 16, an inclined surface 32A to which light from the LEDs 16 enter, a light exit surface 31 which emits the light, and a light guide plate 30 with the light exit surface having a rectangular shape in a planar view. The light guide plate 30 has the inclined surfaces 32A and 32B inclined in a form protruding outside the light guide plate 30 in one direction of the light exit surface 31, as both side surfaces in the one side direction of the light exit surface 31 get closer to the side of the light exit surface 31. The inclined surfaces 32A and 32B on the both sides have symmetrical shapes with each other. One of the inclined surfaces 32A and 32B is a light entrance surface and is facing a luminous surface 16a of the LED 16.
    Type: Application
    Filed: December 1, 2010
    Publication date: October 18, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takehisa Yoshida, Tomofumi Osaki, Tomohiro Kosaka, Atsushi Ban
  • Patent number: 8289453
    Abstract: In one embodiment of the present invention, a method is disclosed for driving a display device by which display of a moving image with natural movement is achieved while occurrence of flicker is minimized or prevented. The method for driving a display device includes a display screen where pixels are arranged in a matrix includes inputting image signals for one frame into the display device at established intervals, writing a gray level in accordance with the signal in each of the pixels, and displaying an image on the screen, wherein interpolation is performed between a first gray level of each of the pixels in accordance with an image signal inputted in a given frame, and a second gray level of each of the pixels in accordance with an image signal inputted in a next frame, whereby the gray level of each of the pixels continuously changes from the first gray level to the second gray level.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: October 16, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Daisuke Teragawa
  • Patent number: 8284328
    Abstract: A liquid crystal television includes a display module generating heat, a substrate having a mounting surface and being placed at an interval from the display module, a component group mounted on the mounting surface, and a housing storing the display module, the substrate, and the component group. The mounting surface includes a first surface extending opposite to the display module and a second surface placed at a rear side of the first surface. A component in the component group having the greatest height with respect to the mounting surface is mounted on the first surface of the first surface and the second surface. The housing is provided with a first air vent hole positioned below the substrate and a second air vent hole positioned above the substrate. An airflow circulating through the first air vent hole, space between the display module and the first surface, and the second air vent hole is created within the housing.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: October 9, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yutaka Shinki, Tsuyoshi Tamura, Hideaki Katoh, Nobuyuki Kishimoto
  • Patent number: 8274612
    Abstract: An LCD television includes an LCD panel including a plurality of LCD units with concave structure, three sides of the LCD unit also include liquid crystal molecule (LCM), all of the first side of the LCD unit constitutes a first LCM array and forms a first display interface, all of the second side of the LCD unit constitutes a second LCM array and forms a second display interface, all of the third side of the LCD unit constitutes a third LCM array and forms a third display interface. The LCD television also includes three signal conversion modules configured to convert three TV program signals into three control signals respectively, three driving modules are configured to drive the three LCM arrays according to the control signals and cause the first display interface, the second display interface, and the third display interface to display corresponding TV programs.
    Type: Grant
    Filed: October 25, 2009
    Date of Patent: September 25, 2012
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Shih-Fang Wong, Xin Lu, Yu-Cui Zhou
  • Publication number: 20120236213
    Abstract: A lighting device that can includes a chassis including a bottom and light sources. The light sources arranged in a row direction configure a light source group and light source groups are arranged in a column direction. The light source groups include a middle light source group (a middle group) and an end side light source group (an end group). The middle group is provided in a middle portion in the column direction and the end group is provided in an end portion in the column direction. One of the light sources of the end group that is arranged at a most distal end on one end side in the row direction is arranged on an outer side in the row direction on the bottom than one of the light sources of the middle group that is arranged at a most distal end on the one end side in the row direction.
    Type: Application
    Filed: October 28, 2010
    Publication date: September 20, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Takaharu Shimizu
  • Publication number: 20120229711
    Abstract: The present invention has an object to reduce the manufacturing cost of a power supply substrate connected to a discharge tube in an illuminating device by reducing the size of the power supply substrate. The illuminating device 2 according to the present invention includes a chassis 4, discharge tubes 20 which have electrodes 17 at respective end portions of glass tubes 18 and in which the glass tubes 18 are bent such that these electrodes 17 are disposed in one direction, and a power supply substrate which supplies power to the discharge tubes 20. Two discharge tubes 20 are disposed inside the chassis 4. The discharge tubes 20 are housed side by side inside the chassis 4 such that the respective electrodes of the two discharge tubes 20 are lined up in one direction when the chassis 4 is seen in a plan view.
    Type: Application
    Filed: October 22, 2010
    Publication date: September 13, 2012
    Applicant: Sharp Kabushiki I Kaisha
    Inventor: Yoshiki Takata
  • Publication number: 20120224111
    Abstract: In a direct type backlight device of a liquid crystal display device, a light guide plate is used obtain a uniform in-plane distribution of light emission intensity. A reflective sheet (62) having an opening portion is laminated on a front surface of an LED substrate (60), and an LED element (74) is accommodated inside the opening portion. A light guide plate (64) is stacked on the reflective sheet (62). On a front surface of the light guide plate (64), a white reflective film (90) is formed in a non-total reflection region, which is positioned to oppose the LED element (74) and in which an incident angle of light emitted from the LED element (74) to the front surface is smaller than a critical angle. On a rear surface of the light guide plate (64), a pattern made of a white reflective film (92) is formed.
    Type: Application
    Filed: February 29, 2012
    Publication date: September 6, 2012
    Applicant: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventor: Yoshinori Ohshima
  • Patent number: 8259050
    Abstract: A liquid crystal display device and a video processing method of the same are disclosed. A video processing method of a liquid crystal display device includes a first step determining whether a current frame is a motion picture by comparing data of a current frame with data of a previous frame; a second step converting and outputting a number of bits of a white gradation data of the current frame and outputting data of the other gradations without the bit conversion, if it is determined in the first step that the current frame is the motion picture; a third step outputting the data of the current frame without the bit-conversion if it is determined in the first step that the current frame is a still image; and a fourth step comparing the data of the current frame outputted in the second or third step with data of a previous frame and outputting overdriving control (ODC) data converted based on the result of the comparison.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: September 4, 2012
    Assignee: LG Display Co., Ltd.
    Inventor: Jae-Kyeong Yun
  • Publication number: 20120218479
    Abstract: A light source unit base material for manufacturing a plurality of light source units includes a board base material formed in substantially a rectangular shape, and a plurality of light sources provided on the board base material in a row direction and in a column direction and connected electrically in series in the row direction and in the column direction.
    Type: Application
    Filed: October 21, 2010
    Publication date: August 30, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Katsunori Nagata, Yoshinori Ohhashi, Takayuki Komai, Ryuhei Nakamura
  • Publication number: 20120212684
    Abstract: A display device includes a terminal group including terminals for supplying a signal to scanning signal lines or the video signal lines via first terminal wiring. Each of the terminals includes: a first portion, which is formed at an end portion of the first terminal wiring, the first portion having an exposed planar terminal surface; and a second portion, which is provided adjacent to the first portion and is formed around the first portion. The second portion is formed of a conductive thin film covered with an insulating film and formed in the same layer as the first terminal wiring or formed in a different layer from the first terminal wiring, and the second portion is electrically connected to the first terminal wiring at a position spaced apart from a connection portion of the first terminal wiring and the first portion.
    Type: Application
    Filed: February 15, 2012
    Publication date: August 23, 2012
    Inventors: Takahiro Ochiai, Mitsuru Goto
  • Patent number: 8243212
    Abstract: When dividing one frame into a plurality of sub-frames to carry out image display, in a gradation range which is able to be displayed using only sub-frames other than the last sub-frame (for example, luminance ½ or less in the case of two-part division, and luminance ¾ or less in the case of four-part division), the luminance of the last sub-frame is set as the minimum luminance, and luminance display is carried out using the other sub-frames.
    Type: Grant
    Filed: February 15, 2006
    Date of Patent: August 14, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazunari Tomizawa, Takeshi Kumakura
  • Publication number: 20120200786
    Abstract: The present invention has an object to provide a lighting device enabled to reduce a cost. A plurality of light source units U, formed by arranging a plurality of light source modules 30A on an LED board 18, arranged parallel to each other constitutes a backlight unit 12. In the backlight unit 12, the plurality of light source modules 30 in one LED board 18 includes a light source module 30A and a light source module 30B. The light source module 30A has an optical directivity directing light therefrom into a first direction in a plan view. The first direction is along an arrangement direction of the light source units U. The light source module 30B has an optical directivity directing light therefrom into a second direction opposite to the first direction in a plan view.
    Type: Application
    Filed: September 9, 2010
    Publication date: August 9, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Daisuke Kamata
  • Patent number: 8228437
    Abstract: A video processing method and apparatus for a liquid crystal display (LCD) device is disclosed. The video processing method for the LCD device includes detecting noise by comparing data of a previous frame with data of a current frame, if the noise is detected, removing the noise from the current frame data, and outputting the resultant current frame data having no noise together with the previous frame data, and comparing the previous frame data with the resultant current frame data having no noise in a lookup table, selecting overdriving data corresponding to the comparison result, and outputting the selected overdriving data.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: July 24, 2012
    Assignee: LG Display Co., Ltd.
    Inventors: Young Ho Kim, Sung Jo Koo
  • Patent number: 8229580
    Abstract: According to one embodiment of the invention, an operation control module 107p controls an operation status of an electronic apparatus in response to an operation signal from an operation module. A power saving status setting module 107a sets the electronic apparatus into the power saving status when a sensing module 108 does not acquire a preset detection output (user detection). A first power saving status releasing module 107b releases the power saving status of electronic apparatus when the sensing module has acquired the preset detection output (user detection). A second power saving status releasing module 107c releases the power saving status when the operation signal is input from the operation module in the power saving status.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: July 24, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Katsuya Ohno
  • Publication number: 20120176557
    Abstract: Occurrence of uneven brightness in a backlight unit is suppressed. A backlight unit 12 includes a hot cathode tube 17 as a light source; a chassis 14 including a bottom plate 14a arranged on a side opposite to a light exit side with respect to the hot cathode tube 17 and housing the hot cathode tube 17; a reflection sheet 20 including a bottom portion 20a extending along the bottom plate 14a and a rising portion 20b rising from a bottom portion 20a to the light exit side and reflecting light; a first holding member 21 arranged on a side opposite to the light exit side with respect to each rising portion 20b and fixed to the chassis 14; and a second holding member 22 arranged on the light exit side of each rising portion 20b and configured to sandwich each rising portion 20b with the first holding member 21.
    Type: Application
    Filed: August 19, 2010
    Publication date: July 12, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Takaharu Shimizu
  • Publication number: 20120176558
    Abstract: Uneven brightness caused by displacement of an optical member with respect to a light source is prevented. A backlight unit 12 includes a light source 18, a chassis 14 housing the light source 18, and optical members 15 disposed on a light exit side with respect to the light source 18. The optical members 15 have different optical properties between an area LA overlapping with the light source 18 and an area LN not overlapping with the light source 18. Convex portions 19b are provided on relay connectors 19 as a light source positioning member provided on the light source 18 for positioning the light source 18 with respect to the optical members 15. Cutout portions 33 are provided on a diffuser 30 as an optical member positioning member disposed on the optical members 15 for positioning the optical members 15 with respect to the light source 18.
    Type: Application
    Filed: September 29, 2010
    Publication date: July 12, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Mayumi Nakamura
  • Publication number: 20120169943
    Abstract: A backlight unit includes a light source, a chassis, an optical member, and a reflection member. The chassis includes a bottom plate disposed on a side opposite to a light output side of the light source and houses the light source. The optical member is disposed more to the light output side than the light source. The reflection member is configured to reflect light and disposed in the chassis. The reflection member includes rising portions rising from a side close to the bottom plate toward a side close to the optical member. The rising portions rise stepwise and include at least first rising sections with base ends on the bottom plate and second rising sections with distal ends reaching the optical member. Each second rising section and the optical member form an angle larger than an angle between each first rising section and the bottom plate.
    Type: Application
    Filed: August 19, 2010
    Publication date: July 5, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yasumori Kuromizu, Mayumi Nakamura
  • Publication number: 20120169944
    Abstract: A lighting device includes a light source, a chassis, a reflection sheet, a spacer, and a press member. The chassis includes a bottom plate disposed on a side opposite to a light output side with respect to the light source and houses the light source. The reflection sheet includes a bottom portion disposed along the bottom plate and a rising portion rising from the bottom portion toward the light output side and reflects light. The spacer is arranged between the bottom plate and the rising portion. The press member has a press surface pressing the rising portion from the light output side. The press member and the spacer have mounting structures with which the press member is mounted to the spacer by moving the press member in a direction along the rising portion and to hold the press member to the spacer.
    Type: Application
    Filed: August 19, 2010
    Publication date: July 5, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yasumori Kuromizu
  • Publication number: 20120169946
    Abstract: An object of the invention is to suppress uneven brightness in a backlight unit. The backlight unit 12 includes a hot cathode tube 17 as a light source; a chassis 14 having a bottom plate 14a disposed on a side opposite to a light output side with respect to the hot cathode tube 17 and housing the hot cathode tube 17; a reflection sheet 20 having a bottom portion 20a disposed along the bottom plate 14a and a rising portion 20b rising from the bottom portion 20a toward the light output side and reflecting light; and a pressing member 21 extending over the bottom portion 20a and the rising portion 20b and having a pressing surface 28 pressing the bottom portion 20a and the rising portion 20b from the light output side.
    Type: Application
    Filed: August 19, 2010
    Publication date: July 5, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yasumori Kuromizu
  • Publication number: 20120169945
    Abstract: Uneven brightness is less likely to occur in a backlight unit. In a backlight unit 12, suppose that a maximum value and a minimum value of light reflectance of at least a first surface 30a of a diffuser plate 30 facing a hot cathode tube 17 are defined as Rmax Rmin, respectively, a rising proximal position BP of each rising portion 20b of a reflection sheet 20 is provided to overlap with an area of the diffuser plate 30 having light reflectance R that satisfies the Expression given below, and a rising distal position EP of each rising portion 20b is provided not to overlap with an area of the diffuser plate 30 having the light reflectance R that satisfies the Expression given below.
    Type: Application
    Filed: August 19, 2010
    Publication date: July 5, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yasumori Kuromizu
  • Publication number: 20120162546
    Abstract: According to one embodiment, an electronic apparatus includes a rectangular liquid crystal panel, a light-guide plate, a light bar corresponding a short side of the liquid crystal panel and including a plurality of light-emitting diodes, a reflector on the light-guide plate, a prism sheet on the light-guide plate on a side opposite to the reflector, and a polarizing sheet on the prism sheet configured to diffuse light.
    Type: Application
    Filed: October 21, 2011
    Publication date: June 28, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Tsuyoshi Shimomichi
  • Publication number: 20120162545
    Abstract: A liquid crystal display apparatus includes a plurality of areas in which response speeds greatly different from each other coexist in a pixel. A first replacement process section replaces the image data of the desired target frame with a first gradation, when a gradation transition from a current frame to a desired target frame corresponds to the above gradation transition. A second replacement process section replaces the image data of the current frame with a second value. The first value is set to a value causing the pixel to respond at a relatively higher speed without the occurrence of the excessive brightness. Without avoiding the deterioration of the image, it is possible to drive a liquid crystal display apparatus including areas whose response speeds are different from each other coexist in the pixel, such as a liquid crystal display apparatus of vertically aligned mode and normally black mode.
    Type: Application
    Filed: February 1, 2012
    Publication date: June 28, 2012
    Inventors: Makoto Shiomi, Kazunari Tomizawa, Koichi Miyachi, Tomoo Furukawa
  • Publication number: 20120147277
    Abstract: To provide a back light unit that reduces an uneven brightness and has a spatially uniform brightness distribution. According to an aspect of the present invention, the back light unit comprises an LED and a light guide plate for guiding light from the LED to a liquid crystal panel side, wherein a recess is provided on the back surface side of the light guide plate, wherein a plurality of LEDs are housed in the recess, and wherein a light amount limiting member is provided at a position facing the recess on s light exit surface side of the light guide plate. The light amount limiting member is configured, for example, by applying an ink with a predetermined optical property to a transparent sheet.
    Type: Application
    Filed: November 17, 2011
    Publication date: June 14, 2012
    Inventors: Shoji Yamamoto, Satoshi Ouchi, Mayumi Nagayoshi, Hajime Inoue
  • Publication number: 20120147278
    Abstract: A lighting device according to the present invention includes a hot cathode tube 17, a chassis 14 storing the hot cathode tube 17 therein, and a heat radiating mechanism 40 configured to come in contact with the hot cathode tube 17 and radiate heat of the hot cathode tube 17. The heat radiating mechanism 40 has a heat radiating sheet 43 configured to contact with the hot cathode tube 17, and a displacing part 42 displacing the heat radiating sheet 43 between a contact position where the heat radiating sheet is in contact with the hot cathode tube 17 and a non-contact position where the heat radiating sheet 43 is not in contact with the hot cathode tube 17. The displacing part 42 displaces the heat radiating sheet 43 to the non-contact position at a temperature that is lower than a predetermined temperature and to the contact position at a temperature that is higher than the predetermined temperature.
    Type: Application
    Filed: June 25, 2010
    Publication date: June 14, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Shiyoshi Cho
  • Patent number: 8197072
    Abstract: Provided is a light emitting device of an electronic device, provided with a DLP (Digital Light Processing) projector and a display unit, which is configured in such a manner that the light generated by the operation of the DLP projector can be re-used as a backlight light of the display unit. The disclosed light emitting device includes a first mirror for projecting a light of the DLP projector on a flat area provided ahead of the first mirror in an intermediate operation state of the first mirror; a light concentration mirror for converging the light projected on the flat area, the light concentration mirror being provided at a position adjacent to the flat area; and an optical fiber for transferring the light converged by the light concentration mirror to the display unit and enabling re-use of the transferred light as a light for a backlight of the display unit.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: June 12, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jin-Wook Kwon, Yong-Chan Keh, Byeong-Hoon Park, Sung-Sun Kim
  • Publication number: 20120133847
    Abstract: Disclosed is an LCD device in which a control signal is received and transmitted via a transmission line to be used for receiving and transmitting LVDS video signal between a timing controller and a source drive IC, the LCD device comprising a liquid crystal display panel for display an image; a data driver for driving data lines of the liquid crystal display panel through a plurality of source drive ICs; and a timing controller for outputting a packet signal obtained by combining a control signal and video signal to the source drive IC, wherein the source drive IC separates and outputs the control signal and video signal from the packet signal transmitted from the timing controller.
    Type: Application
    Filed: November 8, 2011
    Publication date: May 31, 2012
    Inventors: Myung Kook MOON, Hyun Taek Nam, Jong Woo Kim
  • Publication number: 20120120326
    Abstract: Provided is an edge-light illuminating device capable of preventing formation of a gap between point light sources and edge faces of a light guide plate, and also capable of allowing heat expansion of the light guide plate. An edge-light illuminating device 1 for illuminating a liquid crystal panel from behind includes a rectangular-shaped light guide plate 2, a wall 3 surrounding the light guide plate, a plurality of holding members 4 disposed between edge faces 7 of the light guide plate and the wall and arranged to hold the light guide plate within the wall, and two rows 6 each consisting of point light sources 5 aligned along the edge faces 7a, 7b on two adjacent sides of the light guide plate, wherein some of the holding members, which are opposed to the point light sources while interposing the light guide plate therebetween, are elastic holding members 4a having elasticity.
    Type: Application
    Filed: March 31, 2010
    Publication date: May 17, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yoshiki Takata
  • Publication number: 20120120325
    Abstract: In a support pin (11) for supporting optical members (43 to 45) through which light from a LED (24) passes, the portion of a top (14), which is in contact with a diffusion plate (43), is formed of a light reflective material, and the portion of a column (12), which supports the top (14), is formed of a light transmissive material.
    Type: Application
    Filed: March 24, 2010
    Publication date: May 17, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Takaharu Shimizu
  • Publication number: 20120113331
    Abstract: Provided is an edge light type illuminating device and the like that can suppress uneven brightness even when a reflective sheet is warped. The edge light type illuminating device includes a light source 2, a substantially transparent light guide plate 3 that is disposed with an end surface 13 thereof facing the light source 2 and that allows light that has entered through the end surface 13 to travel while reflecting repeatedly off a front surface 23 and a rear surface 33, a plurality of scattering sections 4 that are dispersedly disposed over the rear surface 33 of the light guide plate 3 and that scatter the light that has entered through the end surface 13 of the light guide plate 3, causing the light to go out through the front surface, and a reflective sheet 5 that is disposed on the rear surface 33 side of the light guide plate 3 and that reflects light leaking from areas of the rear surface 33 where the scattering sections 4 are not provided.
    Type: Application
    Filed: March 31, 2010
    Publication date: May 10, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yoshiki Takata
  • Patent number: 8174624
    Abstract: An apparatus outputs an image signal for each frame, divides a frame into sub-frames, acquires a first signal of high frequency components and a second signal of low frequency components of a sub-frame, and generates a third signal by multiplying the second signal by K. If a fourth signal obtained by adding the third signal to the first signal falls within a predetermined range, the apparatus outputs the third signal, whereas if the fourth signal includes a portion exceeding the range, the apparatus outputs a signal obtained by correcting the third signal. The apparatus also generates a composition signal of the output signal and the first signal and a fifth signal by multiplying the third signal by a correction amount y of the third signal. As a sub-frame of interest, either the composition signal or the fifth signal is output.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: May 8, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yukihiko Sakashita
  • Publication number: 20120105739
    Abstract: In a lens unit (11), a support pin (12) is continuous with around, for example, a surface vertex (21T) on the lens surface (21S) of the lens (21). As with the lens (21), the support pin (12) is formed of a transparent material, and an end (12M) is connected to part of the lens surface (21S), and a tip end (12P) extends to the side of a liquid crystal display panel (59).
    Type: Application
    Filed: March 24, 2010
    Publication date: May 3, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Takaharu Shimizu
  • Publication number: 20120099027
    Abstract: A backlight unit (49) for a display device (69) provided with a liquid crystal display panel (59) comprises a chassis (41), a diffusion plate (43) supported by the chassis, and point-like light sources supported by mounting substrates (21) provided on the chassis. The point-like light sources comprise LEDs (22) mounted on the mounting substrates. The mounting substrates are connected to each other by connectors (25) to form rows (26) of the mounting substrates, and the rows (26) are arranged side by side. The rows of the mounting substrates each consist of two, short and long mounting substrates, and the rows are arranged in a mixed state in such a manner that each row consisting of the two, short and long mounting substrates is reversed with respect to each other. As a result, the positions of the connectors are not aligned rectilinearly in the direction in which the rows of the mounting substrate are arranged.
    Type: Application
    Filed: February 17, 2010
    Publication date: April 26, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Nobuhiro Kasai
  • Publication number: 20120092568
    Abstract: A backlight unit 12 according to the present invention includes an LED board 18 including an LED 17 as a light source, a chassis 14 that stores the LED board 18 therein and has an opening 14b through which the light from the LED 17 exits, a chassis reflection sheet 22 that is arranged along an inner surface of the chassis 14 and reflects light and a board reflection sheet 23 that overlaps the LED board 18 on the side of the opening 14b in a plan view, is larger than the LED board 18 and reflects light, and the chassis 14 has a first supporting portion 27 supporting the LED board 18 and a second supporting portion 28 that is arranged closer to the opening 14b than the first supporting portion 27 and supports the board reflection sheet 23.
    Type: Application
    Filed: May 18, 2010
    Publication date: April 19, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Masashi Yokota